Improvement in spring-seats



C. H. LATHROP &J. M. FOWLES.

Improvement in Spring-Seats.

No. 130,922. Pamted All-927,187.2.'

Witnesses.- Inv/'en inf:

lUNITED STATES PATENT CEEICE.

OHANOY H. LATHROP AND JOHN M. FOWLES, OF JERSEY CITY, N. J.

IMPROVEMENT IN SPRING-SEATS.

SPEcrErcATroN. Be it known that we, GEANOY H. LATEEor and JOHN M.FQWLES, both of Jersey City,

in the county of Hudson and State of New Jersey,I have invented anImproved Spring- Seat, of which the following is a speciiication: i

It is the object of our invention to furnish a spring-seat of small costand simple construction, adapted to house and oiiice chairs, stools, andseats for various other purposes; and` it consists in the employment ofa coiled spring formed as hereinafter described, to act by distension,in combination with an inclosed standard or spindle, and an inclosingtubeor case, said spring being provided with a neutral coil or coils atone end, to form a bearing against the head of the standard, and with ahook or hooks at the opposite end to engage with the inclosing cylinder.

As shown in the drawing, Figure 1 is an elevation of a stool mountedwith our improved spring. Fig. 2 is a like view with the springinverted, showing the inclosing-case below, (being in both views brokenaway to show the spring;) and Fig. 3 is a separate view of the springremoved.

We construct the spring C for this purpose, preferably of two strands ofwire, though a greater number may sometimes be used with advantage,wound in close parallel coils. The head a consists of what we termneutral coils,

. as they do not contribute to the elasticity,

their office being to form a bearing for the rod or standard A, throughthe end of which the supported weight acts upon the coils of the springto distend them. The strands at their opposite ends are bent outwardly,forming hooks c c, which engage with the extremity of the cylinder orcase B, and form the counter bearings. When the strands are two or morein number these hooks are placed on opposite sides or at uniformdistances apart, giving an equal bearing to the spring; and a ring orwasher, f,'may be interposed with advantage, preventing unequal wear andfriction when the cylinder is revolved. E is the cushion and D the base,or other suitable support, to which the rod A or the cylinder B isconnected, it

being optional which is attached to it, the operation being the same inthe one method, shown in Fig. 1, as in the reverse, as represented inFig. 2. The elastic effect is attained by the separation or distensionofthe coils by which the action is not limited, as in the case of thosesprings formed with open coils to act by compression, in which theaction is abruptly stopped by the coils coming in contact with oneanother. The spring being formed of duplex strands ladmits of smallerwire being used, reducing the labor and cost of manufacture, gives agreater degree of elastic action or distension, is softer and moreyielding and more durable than if made of a single strand, qualitieswhich especially adapt it for the purpose designed-that of aspring-seat.

We claim as our invention- The spring G provided with thehead-connection a, in combination with the rod A, cylinder B, seat E,and base D, with or without the packing f, all constructed and arrangedas herein shown and set forth.

1n witness whereof we have hereunto signed our names in the presence oftwo subscribing witnesses.

CHANCY H. LATHROP. JOHN M. FOVLES.

Witnesses z J. FRASER, GHAs. M. HIGGINS. e

